CN108911547A - The preparation method and applications of bituminous pavement stalk fibre - Google Patents
The preparation method and applications of bituminous pavement stalk fibre Download PDFInfo
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- CN108911547A CN108911547A CN201810846305.2A CN201810846305A CN108911547A CN 108911547 A CN108911547 A CN 108911547A CN 201810846305 A CN201810846305 A CN 201810846305A CN 108911547 A CN108911547 A CN 108911547A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 25
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- 235000002017 Zea mays subsp mays Nutrition 0.000 claims abstract description 98
- 235000005822 corn Nutrition 0.000 claims abstract description 98
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 67
- 239000010902 straw Substances 0.000 claims abstract description 45
- 238000001035 drying Methods 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000000227 grinding Methods 0.000 claims abstract description 20
- 239000010907 stover Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
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- 238000006243 chemical reaction Methods 0.000 claims description 14
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- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000010348 incorporation Methods 0.000 claims description 3
- 239000010426 asphalt Substances 0.000 abstract description 17
- 239000002657 fibrous material Substances 0.000 abstract description 10
- 239000013521 mastic Substances 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 abstract 1
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- 238000012360 testing method Methods 0.000 description 16
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- 238000001938 differential scanning calorimetry curve Methods 0.000 description 4
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- 235000007164 Oryza sativa Nutrition 0.000 description 3
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The preparation method and applications of bituminous pavement stalk fibre, the application the present invention relates to a kind of preparation method of the fibrous material of bituminous pavement and in modified pitch, it alleviates problem of environmental pollution to utilize waste straw material.Preparation method：One, by the skin stalk splitter of corn stover, straw skin is cleaned；Two, the straw skin of drying is cut into strip, is ground after crushing, the corn stalk fiber after being ground；Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.25%~3%, is stirred to react 15~60 minutes in 50~90 DEG C of at a temperature of constant temperature, bituminous pavement stem fibric material is obtained after flushing.Using：Using the stalk fibre as the incorporating modified pitch of outer-penetrating agent.The corn stalk fiber material that the present invention obtains is in asphalt mastic, the more uniform dispersion of fiber distribution, stalk fibre itself to have good oil absorbency, and oil suction multiplying power reaches 25 or more.
Description
Technical field
Application the present invention relates to a kind of preparation method of the fibrous material of bituminous pavement and in modified pitch.
Background technique
Modified pitch, which refers to, adds the outer-penetrating agents such as resin, polymer, levigate rubber powder, fiber or other materials, so that
The performance of pitch or asphalt is improved and manufactured bituminous cements.Apply and study at present relatively broad modification
Agent is various polymer modifiers such as SBS, SBR, PE, EVA etc., but compares matrix pitch, with polymer modified asphalt making road
Face is expensive, and construction cost is excessively high；Secondly polymer modified asphalt is unstable in the presence of storage in use and mixture mixes and stirs
The problems such as execution conditions are harsh.Therefore, although polymer modifiers is widely recognized and applies at present, exploitation is new more
It is rationally imperative with advantageous road asphalt modifier and modified pitch production technology.Currently, domestic and foreign scholars pass through to
Adding of fiber enhances pavement performance in bituminous concrete, and achieves good results, and is used in the kinds of fibers of bituminous pavement
Have very much, such as basalt fibre, lignin fibre and plant fiber etc., use will be greatly improved after bituminous pavement adding of fiber
Service life.
China is used as large agricultural country, and annual grain yield ranks first in the world, and the stalk yield as agricultural and sideline product reaches 800,000,000
Ton or so, with being constantly progressive for agricultural science and technology, yield will gradually increase.Stalk has caused as reproducible utilization resource
The concern of countries in the world is rationally recycled and can largely be alleviated using agricultural byproducts stalk resource the pressure of environment and makes
With the pressure of limited resources.
Summary of the invention
The purpose of the invention is to utilize waste straw material, alleviates problem of environmental pollution, pass through physical chemistry means
Stalk is handled, and is applied it in asphalt material, bitumen properties are improved, and then a kind of bituminous pavement use is provided
The preparation method and applications of stalk fibre.
The preparation method of bituminous pavement of the present invention stalk fibre follows these steps to realize：
One, by the skin stalk splitter of corn stover, isolated straw skin is cleaned using water, drying to constant weight,
The straw skin dried；
Two, the straw skin of drying is cut into strip, is crushed using beater grinder, obtain corn stalk fiber, so
Corn stalk fiber is put into milled processed in grinder afterwards, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.25%~3%,
It is stirred to react 15~60 minutes in 50~90 DEG C of at a temperature of constant temperature, is rinsed, is dried to deionized water after the reaction was completed
Constant weight obtains bituminous pavement stem fibric material.
It is to use stalk fibre to change as outer-penetrating agent incorporation bituminous pavement that bituminous pavement of the present invention, which uses the application of stalk fibre,
Property pitch.
The present invention first carries out crushing polishing to straw skin, since stalk fibre length and fineness influence whether oil suction
Amount, thus by control stalk grinding time, and then fiber oil absorptive rate is controlled, corn stalk is then handled by sodium hydroxide solution
Stalk fiber impregnates partial lignin, hemicellulose and the pectin on surface, wax etc. in removal stalk fibre by chemical solution
Ingredient, sodium hydroxide addition solution pre-processes so that corn stalk fiber generation saponification, the lipid base that wherein aromatic ring is connected
Originally it is removed, keeps its original surface smooth without obvious damaged and hole stem fibric material, be in by handling rear surface
Now apparent gully and fibrillating, so that stalk fibre surface becomes coarse, internal void becomes larger, and increases stalk fibre material
The oil absorbency of material, and the concentration of sodium hydroxide solution, whipping temp and mixing time are to the oil absorbency of stem fibric material
It significantly affects, therefore qualitative, quantitative control is carried out to corn stalk fiber materials chemistry treatment process.
The corn stalk fiber material that the present invention obtains is for mixing pitch with conventional lignin fibre in asphalt mastic
In compare, fiber is distributed more uniform dispersion, and stalk fibre itself has a good oil absorbency, oil suction multiplying power reach 25 with
On, thermal stability is preferable, has good improvement to asphalt mastic performance.
The present invention utilizes agricultural wastes straw resource, and a kind of jade that environmental protection is cheap is prepared by physico-chemical process
Rice stem fibric material can improve the performance of asphalt and utilize the reproducible resource of agricultural byproducts stalk, not only
It is a kind of protection to national limited resources, but also can increase the service life of asphalt roads, saves maintenance cost.
Detailed description of the invention
Fig. 1 is 42 times of corn stalk fiber of the scanning electron microscope diagram without naoh treatment；
Fig. 2 is 500 times of corn stalk fiber of the scanning electron microscope diagram without naoh treatment；
Fig. 3 is 100k times of corn stalk fiber of the scanning electron microscope diagram without naoh treatment；
Fig. 4 is 200k times of corn stalk fiber of the scanning electron microscope diagram without naoh treatment；
Fig. 5 is 74 times of corn stalk fiber of the scanning electron microscope diagram after naoh treatment；
Fig. 6 is 200 times of corn stalk fiber of the scanning electron microscope diagram after naoh treatment；
Fig. 7 is 200k times of corn stalk fiber of the scanning electron microscope diagram after naoh treatment；
Fig. 8 is 500k times of corn stalk fiber of the scanning electron microscope diagram after naoh treatment；
Fig. 9 is without chemically treated corn stalk fiber TG and DSC curve figure, wherein 1 represents TG curve, 2 represent DSC
Curve；
Figure 10 is the corn stalk fiber TG and DSC curve figure after chemical treatment, wherein 1 represents TG curve, 2 are represented
DSC curve.
Specific embodiment
Specific embodiment one：The preparation method of present embodiment blueness road surface stalk fibre follows these steps to implement：
One, by the skin stalk splitter of corn stover, isolated straw skin is cleaned using water, drying to constant weight,
The straw skin dried；
Two, the straw skin of drying is cut into strip, is crushed using beater grinder, obtain corn stalk fiber, so
Corn stalk fiber is put into milled processed in grinder afterwards, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.25%~3%,
It is stirred to react 15~60 minutes in 50~90 DEG C of at a temperature of constant temperature, is rinsed, is dried to deionized water after the reaction was completed
Constant weight obtains bituminous pavement stem fibric material.
Specific embodiment two：The present embodiment is different from the first embodiment in that step 1 uses skin-stalk separator
By the skin stalk splitter of corn stover.
Specific embodiment three：The present embodiment is different from the first and the second embodiment in that step 2 is by the straw of drying
Stalk skin is cut into the strip having a size of (0.5~1.5cm) × (2~4cm).
Specific embodiment four：After step 2 crushes unlike one of present embodiment and specific embodiment one to three
Corn stalk fiber diameter be 0.5~2.0mm, length be 0.3~0.6cm.
The fineness that present embodiment crushes is 8~120 mesh.
Specific embodiment five：With every in step 2 unlike one of present embodiment and specific embodiment one to four
Revolving speed milled processed 3~5 minutes of 3000 turns of minute.
Specific embodiment six：Step 3 unlike one of present embodiment and specific embodiment one to five 75~
Constant temperature is stirred to react 30~45 minutes at a temperature of 82 DEG C.
Specific embodiment seven：After step 2 grinding unlike one of present embodiment and specific embodiment one to six
Corn stalk fiber diameter be 0.09~0.5mm, length be less than 2mm.
Specific embodiment eight：Bituminous pavement is used stalk fibre as the incorporating modified pitch of outer-penetrating agent by present embodiment.
Specific embodiment nine：Bituminous pavement is used unlike one of present embodiment and specific embodiment one to six
Stalk fibre presses the incorporating modified pitch of incorporation of 6wt%~10wt%.
Embodiment 1：The preparation method of the present embodiment bituminous pavement stalk fibre follows these steps to realize：
One, using skin-stalk separator by the skin stalk splitter of corn stover, isolated straw skin is carried out using water clear
It washes, drying to constant weight, the straw skin dried；
Two, the straw skin of drying is cut into having a size of (0.5~1.5cm) × (2~4cm) strip, it is omnipotent using WKF250
Pulverizer crush 5 minutes, controls pulverizer main shaft revolving speed 4000r/min, and smashed fibre diameter is 0.5~2.0mm,
Length is 0.3~0.6cm, obtains corn stalk fiber, 50g corn stalk fiber is then put into grinder with per minute 3000
The speed turned is ground 3 minutes, and due to 3000 turns per minute of grinder rotating speed, temperature is excessively high need to stop grinding after one minute for every grinding
Mill, cooling are ground again after five minutes, until terminating, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.5%, at 80 DEG C
At a temperature of temperature constant magnetic stirring react 30 minutes, the revolving speed of magnetic stirring apparatus is 2000 turns per minute, is spent after the reaction was completed
Ionized water is rinsed, and drying to constant weight obtains bituminous pavement stem fibric material.
Embodiment 2：The preparation method of the present embodiment bituminous pavement stalk fibre follows these steps to realize：
One, using skin-stalk separator by the skin stalk splitter of corn stover, isolated straw skin is carried out using water clear
It washes, drying to constant weight, the straw skin dried；
Two, the straw skin of drying is cut into having a size of (0.5~1.5cm) × (2~4cm) strip, it is omnipotent using WKF250
Pulverizer crush 5 minutes, controls pulverizer main shaft revolving speed 4000r/min, obtains corn stalk fiber, then by 50g jade
Rice stalk fibre, which is put into grinder, to be ground 3.5 minutes, due to 3000 turns per minute of grinder rotating speed, temperature after every grinding one minute
Spending height need to stop grinding, and cooling is ground again after five minutes, until terminating, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.5%, at 80 DEG C
At a temperature of constant temperature be stirred to react 30 minutes, be rinsed after the reaction was completed with deionized water, drying to constant weight obtains asphalt road
Face stem fibric material.
Embodiment 3：The preparation method of the present embodiment bituminous pavement stalk fibre follows these steps to realize：
One, using skin-stalk separator by the skin stalk splitter of corn stover, isolated straw skin is carried out using water clear
It washes, drying to constant weight, the straw skin dried；
Two, the straw skin of drying is cut into having a size of (0.5~1.5cm) × (2~4cm) strip, it is omnipotent using WKF250
Pulverizer crush 5 minutes, controls pulverizer main shaft revolving speed 4000r/min, corn stalk fiber is obtained, then by 50g jade
Rice stalk fibre, which is put into grinder, to be ground 4 minutes, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.5%, at 80 DEG C
At a temperature of constant temperature be stirred to react 30 minutes, be rinsed after the reaction was completed with deionized water, drying to constant weight obtains asphalt road
Face stem fibric material.
Embodiment 4：The preparation method of the present embodiment bituminous pavement stalk fibre follows these steps to realize：
One, using skin-stalk separator by the skin stalk splitter of corn stover, isolated straw skin is carried out using water clear
It washes, drying to constant weight, the straw skin dried；
Two, the straw skin of drying is cut into having a size of (0.5~1.5cm) × (2~4cm) strip, it is omnipotent using WKF250
Pulverizer crush 5 minutes, obtains corn stalk fiber, then 50g corn stalk fiber is put into grinder and grinds 3.5
Minute, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.25%, 80
Constant temperature is stirred to react 30 minutes at a temperature of DEG C, is rinsed after the reaction was completed with deionized water, and drying to constant weight obtains pitch
Road surface stem fibric material.
Embodiment 5：The preparation method of the present embodiment bituminous pavement stalk fibre follows these steps to realize：
One, using skin-stalk separator by the skin stalk splitter of corn stover, isolated straw skin is carried out using water clear
It washes, drying to constant weight, the straw skin dried；
Two, the straw skin of drying is cut into having a size of (0.5~1.5cm) × (2~4cm) strip, it is omnipotent using WKF250
Pulverizer crush 5 minutes, obtains corn stalk fiber, then 50g corn stalk fiber is put into grinder and grinds 3.5
Minute, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 1%, at 80 DEG C
At a temperature of constant temperature be stirred to react 30 minutes, be rinsed after the reaction was completed with deionized water, drying to constant weight obtains bituminous pavement
Use stem fibric material.
Embodiment 6：The preparation method of the present embodiment bituminous pavement stalk fibre follows these steps to realize：
One, using skin-stalk separator by the skin stalk splitter of corn stover, isolated straw skin is carried out using water clear
It washes, drying to constant weight, the straw skin dried；
Two, the straw skin of drying is cut into having a size of (0.5~1.5cm) × (2~4cm) strip, it is omnipotent using WKF250
Pulverizer crush 5 minutes, obtains corn stalk fiber, then 50g corn stalk fiber is put into grinder and grinds 3.5
Minute, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.5%, at 70 DEG C
At a temperature of constant temperature be stirred to react 30 minutes, be rinsed after the reaction was completed with deionized water, drying to constant weight obtains asphalt road
Face stem fibric material.
Embodiment 7：The preparation method of the present embodiment bituminous pavement stalk fibre follows these steps to realize：
One, using skin-stalk separator by the skin stalk splitter of corn stover, isolated straw skin is carried out using water clear
It washes, drying to constant weight, the straw skin dried；
Two, the straw skin of drying is cut into having a size of (0.5~1.5cm) × (2~4cm) strip, it is omnipotent using WKF250
Pulverizer crush 5 minutes, obtains corn stalk fiber, then 50g corn stalk fiber is put into grinder and grinds 3.5
Minute, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.5%, at 90 DEG C
At a temperature of constant temperature be stirred to react 30 minutes, be rinsed after the reaction was completed with deionized water, drying to constant weight obtains asphalt road
Face stem fibric material.
Embodiment 8：The preparation method of the present embodiment bituminous pavement stalk fibre follows these steps to realize：
One, using skin-stalk separator by the skin stalk splitter of corn stover, isolated straw skin is carried out using water clear
It washes, drying to constant weight, the straw skin dried；
Two, the straw skin of drying is cut into having a size of (0.5~1.5cm) × (2~4cm) strip, it is omnipotent using WKF250
Pulverizer crush 5 minutes, obtains corn stalk fiber, then 50g corn stalk fiber is put into grinder and grinds 3.5
Minute, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.5%, at 80 DEG C
At a temperature of constant temperature be stirred to react 15 minutes, be rinsed after the reaction was completed with deionized water, drying to constant weight obtains asphalt road
Face stem fibric material.
Embodiment 9：The preparation method of the present embodiment bituminous pavement stalk fibre follows these steps to realize：
One, using skin-stalk separator by the skin stalk splitter of corn stover, isolated straw skin is carried out using water clear
It washes, drying to constant weight, the straw skin dried；
Two, the straw skin of drying is cut into having a size of (0.5~1.5cm) × (2~4cm) strip, it is omnipotent using WKF250
Pulverizer crush 5 minutes, obtains corn stalk fiber, then 50g corn stalk fiber is put into grinder and grinds 3.5
Minute, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.5%, at 80 DEG C
At a temperature of constant temperature be stirred to react 45 minutes, be rinsed after the reaction was completed with deionized water, drying to constant weight obtains asphalt road
Face stem fibric material.
The present embodiment to straw skin crush polish, to after polishing stalk fibre carry out sieve test, obtain diameter 0.425~
Within the scope of 0.30mm composition ratio be 20%~30%, diameter within the scope of 0.3~0.105mm composition ratio be 30%~
40%, the composition ratio less than 0.105mm accounts for 30%~40%.
Oil absorption test
Test raw material：The bituminous pavement stem fibric material that Examples 1 to 9 obtains, comparative example select lignin
Fiber (the positive Xiang in place of production Jilin) and basalt fibre (Jilin Tong Xin basalt Science and Technology Co., Ltd. of producer).
Experimentation：The dried oil absorption material of 0.1g is weighed, is put into the stainless steel cloth of known quality, is immersed in
In 300mL diesel oil.It is taken out after 15min, drains 5min, weighed, calculate oil suction multiplying power.The oil suction times of material is calculated as follows
Rate.And tested all under the same conditions in triplicate, it is averaged as calculated result.
Q indicates the oil suction multiplying power of material, m in above formulawThe quality of material, m after expression oil suctioniIndicate the initial mass of material.
The oil absorbency of 1 fibrous material of table
By the oil absorbency test result of stalk fibre it is recognised that the obtained stalk fibre oil suction multiplying power of experimental example 2 most
Height, therefore the stem fibric material of choice experiment example 2 carries out next performance verification.
Scanning electron microscope test
This experimental applications scanning electron microscope characterizes the corn stalk fiber handled without solution and process respectively
The microscopic appearance of corn stalk fiber after sodium hydroxide solution processing, while observing pattern variation under different enlargement ratios and going forward side by side
Row comparative analysis.Specific method for making sample is as follows：
First go macro morphology in sample it is most it is similar in single fiber, be directly adhered on conducting resinl, guarantee fine
Dimension can be fully connected on egative film, and then metal spraying 10min in surface is tested.
After naoh treatment, the substances such as the wax coat and pectin on corn stover surface are removed.From Fig. 1-4
And from the point of view of the pattern of Fig. 5-8 corn stalk fiber sodium hydroxide solution before and after the processing, untreated corn stalk fiber surface
It is comparatively smooth, it is continuous layer structure.The continuous layer structure on corn stalk fiber surface is destroyed after processing, forms interruption
Layer structure, corn stalk fiber surface becomes more coarse, and specific surface area increases, and internal tubular structure exposes,
More pitches can be adsorbed, its oil absorbing effect is improved.
Thermogravimetric analysis test
Thermal analyzer is integrated using the STA449C TG-DTA/DSC produced by German company, to sodium hydroxide solution processing
Before and after corn stalk fiber carry out thermogravimetric analysis test.In the analysis process, the rate of heat addition is 10 DEG C/min, in nitrogen
In the atmosphere of gas, trial stretch is 10~600 DEG C, and example weight is about 15mg.
The pyrolysis that can be seen that corn stalk fiber from Fig. 9 and Figure 10 is broadly divided into water drying stage, warm-up phase,
The slow catabolic phase of main thermal decomposition stage and residue.First stage is dehydration and drying stage, mainly due to fibre
Tie up the release of internal water, including mechanical water and chemical absorbed water.Second stage is warm-up phase.The internal junction of corn stalk fiber
Structure resolves into free radical and main functional group, and discharges a small amount of small molecule volatile gas, such as carbon dioxide and carbon monoxide.
Phase III is the fast pyrogenation stage, as can be seen from Figure 10 fiber loss about 70% weight, this is corn stover fibre
The temperature range of dimension pyrolysis most serious, thermal decomposition terminate at about 360 DEG C.It has been generally acknowledged that hemicellulose most unstable in composition
Element starts to decompose at about 150 DEG C, destroys cellulose, the connection between hemicellulose and lignin.As temperature increases, fiber
Weight-loss ratio increases, and reaction rate increases, and reaction rate reaches maximum value at about 340 DEG C.Fourth stage is the slow decomposition of residue,
It is main to generate carbon and ash.In this temperature range, lignin continues to decompose and generate a large amount of escaping gas.
The thermal stability of processed corn stalk fiber will be far better than untreated corn stalk fiber.From Figure 10
In as can be seen that processing after cross corn stalk fiber in 260 DEG C of beginning fast pyrogenations.It is from Fig. 9 it is known that untreated
Corn stalk fiber is gradually pyrolyzed since room temperature, and starts fast pyrogenation at 200 DEG C.This show most of thermal stability compared with
The ingredient of difference is removed after naoh treatment, and the thermal stability of fiber greatly improves.Since matrix pitch mix temperature is big
About it can reach 200 DEG C in 170~180 DEG C and modified pitch, by test result it is found that corn after treatment
Stem fibric material can be used in the construction of bituminous pavement.
Thermal stability test
Test raw material：Lignin fibre (the positive Xiang in place of production Jilin) and the Black Warrior are selected in the stem fibric material of embodiment 2, comparison
Rock fiber (Jilin Tong Xin basalt Science and Technology Co., Ltd. of producer).
Experimentation：Take the representative fiber sample of certain mass.After baking oven is preheated to 105 DEG C ± 5 DEG C, by sample and crucible
It is put into porcelain dish, dries 2h in 105 DEG C of ± 5 DEG C of baking ovens, in drier cooling (at least 30min).Baking oven is preheated to 210
℃±5℃.Crucible is weighed on balance, accurately to 0.01g, is denoted as m2；Crucible is reset on balance, takes 10g ± 0.10g
Fiber samples are put on crucible and weigh, and accurately to 0.01g, are denoted as m0；Crucible (fibre-bearing) is placed in baking oven, 210 DEG C ± 5 DEG C
Constant temperature 1h ± 1min；Pay attention to observing whether fiber has combustion phenomena.It takes out crucible (fibre-bearing), is put into drier cooling.It will
Crucible (fibre-bearing) is put into weighing quality m on balance1, accurately to 0.01g.
Mass loss is calculated as the following formula, accurately to 0.1.
In formula：
AC-mass loss, unit are percentage (%)；
m0- fiber samples quality, unit are gram (g)；
m1- crucible (fibre-bearing) quality, unit are gram (g)；
m2- quality, unit are gram (g).
The thermal stability of 3 fibrous material of table
Water ratio test
Test raw material：The stem fibric material of embodiment 2, compares lignin fibre (the positive Xiang in place of production Jilin) and basalt is fine
It ties up (Jilin Tong Xin basalt Science and Technology Co., Ltd. of producer).
Experimentation：Baking oven is preheated to 105 DEG C ± 5 DEG C, porcelain dish is placed on weighing quality m on balance2, accurately extremely
0.01g resets porcelain dish on balance, and 10.0g ± 0.1g fiber samples is taken to be put into weighing quality m in porcelain dish0, accurately extremely
0.01g；Porcelain dish (fibre-bearing) is placed in baking oven, 105 DEG C ± 5 DEG C are heated to constant weight, no less than 2h；Porcelain dish is taken out (containing fibre
Dimension), it is put into drier cooling.Weighing porcelain dish (fibre-bearing) quality m on balance will be put into after cooling1, accurately to 0.01g.
Fiber moisture is calculated as follows, accurately to 0.1.
In formula：
WC-fiber moisture, unit are percentage (%)；
m0- fiber samples quality, unit are gram (g)；
m1- porcelain dish (fibre-bearing ash content) quality, unit are gram (g)；
The moisture content of 3 fibrous material of table
| Fiber species | Moisture content (%) |
| Experimental example 2 | 3.6 |
| Lignin | 3.8 |
| Basalt | 0.1 |
Bottle method measures fibre density test
Test raw material：The stem fibric material of embodiment 2, compares lignin fibre (the positive Xiang in place of production Jilin) and basalt is fine
It ties up (Jilin Tong Xin basalt Science and Technology Co., Ltd. of producer).
Experimentation：Representative fiber samples 3g ± 1g is taken, it is cold in drier in 60 DEG C of ± 5 DEG C of drying in oven 2h
But it is stand-by to arrive room temperature.Weigh dry specific gravity bottle quality m1；Sample is put into weighing sample mass m2 in specific gravity bottle；By 23 DEG C ±
0.5 DEG C of immersion liquid injection specific gravity bottle to sample is totally submerged, and specific gravity bottle is placed in drier and is vacuumized, bubble removing is removed；Stop
It only vacuumizes, 23 DEG C of ± 0.5 DEG C of immersion liquids is continued to fill specific gravity bottle, clean the water on specific gravity bottle outer wall, weighing bottle+liquid
+ sample mass m3；D) it empties water in specific gravity bottle, after drying, fills 23 DEG C of ± 0.5 DEG C of immersion liquids, specific gravity bottle is placed on drying
It is vacuumized in device, removes bubble removing；Stopping vacuumizes, and cleans the water on specific gravity bottle outer wall, weighing bottle+immersion liquid quality m4；Such as
Fruit immersion liquid is not water, and fibre density is calculated as follows, accurately to 2 significant digits.
In formula：
ρ-fibre density, unit are per cubic centimeter gram of (g/cm3)；
The aerial quality of m2-fiber sample, unit are gram (g)；
M3-bottle+liquid+sample mass, unit are gram (g)；
M4-bottle+immersion liquid quality, unit are gram (g).
The density of 4 fibrous material of table
| Fiber species | Density (g/cm3) |
| Experimental example 2 | 1.04 |
| Lignin | 0.56 |
| Basalt | 2.63 |
Fiber rubber cement performance test
Test raw material：The stem fibric material of embodiment 2, compares lignin fibre (the positive Xiang in place of production Jilin) and basalt is fine
It ties up (Jilin Tong Xin basalt Science and Technology Co., Ltd. of producer).No. 90 matrix pitches (place of production Liaohe River Zhong You petrochemical industry).
Test process：Fibrous material is incorporated into pitch at a temperature of 150 DEG C, is stirred with cutter, until stirring
It mixes uniformly, and dynamic shear test is carried out to fiber rubber cement.
5 fiber rubber cement high-temperature behavior of table
Claims (9)
1. the preparation method of bituminous pavement stalk fibre, it is characterised in that this method is to follow these steps to realize：
One, by the skin stalk splitter of corn stover, isolated straw skin is cleaned using water, drying to constant weight, obtains
The straw skin of drying；
Two, the straw skin of drying is cut into strip, is crushed using beater grinder, obtain corn stalk fiber, then will
Corn stalk fiber is put into milled processed in grinder, the corn stalk fiber after being ground；
Three, the corn stalk fiber after grinding is immersed in the sodium hydroxide solution that mass concentration is 0.25%~3%, 50
Constant temperature is stirred to react 15~60 minutes at a temperature of~90 DEG C, is rinsed after the reaction was completed with deionized water, drying to constant weight
Obtain bituminous pavement stem fibric material.
2. the preparation method of bituminous pavement stalk fibre according to claim 1, it is characterised in that step 1 uses skin
Stalk separator is by the skin stalk splitter of corn stover.
3. the preparation method of bituminous pavement stalk fibre according to claim 1, it is characterised in that step 2 will dry
Straw skin be cut into the strip having a size of (0.5~1.5cm) × (2~4cm).
4. the preparation method of bituminous pavement stalk fibre according to claim 1, it is characterised in that after step 2 crushes
Corn stalk fiber diameter be 0.5~2.0mm, length be 0.3~0.6cm.
5. the preparation method of bituminous pavement stalk fibre according to claim 1, it is characterised in that with every in step 2
Revolving speed milled processed 3~5 minutes of 3000 turns of minute.
6. the preparation method of bituminous pavement stalk fibre according to claim 1, it is characterised in that step 3 75~
Constant temperature is stirred to react 30~45 minutes at a temperature of 82 DEG C.
7. the preparation method of bituminous pavement stalk fibre according to claim 1, it is characterised in that after step 2 grinding
Corn stalk fiber diameter be 0.09~0.5mm, length be less than 2mm.
8. the application of bituminous pavement stalk fibre as described in claim 1, it is characterised in that by bituminous pavement stalk fibre
Dimension is used as the incorporating modified pitch of outer-penetrating agent.
9. the application of bituminous pavement stalk fibre according to claim 1, it is characterised in that by bituminous pavement stalk
Fiber presses the incorporating modified pitch of incorporation of 6wt%~10wt%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111518404A (en) * | 2020-05-27 | 2020-08-11 | 哈尔滨工业大学 | Environment-friendly warm-mix asphalt regenerant and preparation method thereof |
| CN111719313A (en) * | 2020-07-10 | 2020-09-29 | 东北林业大学 | Preparation method and application of rice straw fiber material for asphalt pavement |
| CN112142370A (en) * | 2020-09-14 | 2020-12-29 | 苏州三正路面工程有限公司 | Energy-saving recycled asphalt mixture and preparation method thereof |
| CN113683899A (en) * | 2021-09-02 | 2021-11-23 | 程小冬 | High-strength high-viscosity asphalt and preparation method thereof |
| CN114133587A (en) * | 2021-12-17 | 2022-03-04 | 山东交通学院 | Modified straw fiber and preparation method thereof, asphalt mucilage prepared from modified straw fiber and preparation method of asphalt mucilage |
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| CN107988784A (en) * | 2017-11-28 | 2018-05-04 | 哈尔滨工业大学 | The preparation method and applications of asphalt road corn stalk fiber material |
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| CN107988784A (en) * | 2017-11-28 | 2018-05-04 | 哈尔滨工业大学 | The preparation method and applications of asphalt road corn stalk fiber material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111518404A (en) * | 2020-05-27 | 2020-08-11 | 哈尔滨工业大学 | Environment-friendly warm-mix asphalt regenerant and preparation method thereof |
| CN111719313A (en) * | 2020-07-10 | 2020-09-29 | 东北林业大学 | Preparation method and application of rice straw fiber material for asphalt pavement |
| CN112142370A (en) * | 2020-09-14 | 2020-12-29 | 苏州三正路面工程有限公司 | Energy-saving recycled asphalt mixture and preparation method thereof |
| CN113683899A (en) * | 2021-09-02 | 2021-11-23 | 程小冬 | High-strength high-viscosity asphalt and preparation method thereof |
| CN114133587A (en) * | 2021-12-17 | 2022-03-04 | 山东交通学院 | Modified straw fiber and preparation method thereof, asphalt mucilage prepared from modified straw fiber and preparation method of asphalt mucilage |
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Application publication date: 20181130 |